white rectangle GG 246

Hi,

I bought what was supposed to be 2mg of Alprazolam online.

The pills are rectangles, with 4 sections (3 scores). On the top section is "GG" and in each section below are the numbers 246. I can find GG 249, but nothing about 246. In addition, some of the pills have cracks along the sides leading me to doubt their authenticity.